Whole



, U. s. PATENT QFFICE.

No.2,51e I 1861. i vVIHLEIvO.32,520.l

Looms. v

GEORGE CROMPTON, OF WORCESTER, MASSACHUSETTS.

Letters PatentNo. 2,516, dated October 22,1861.

SPECIFICATION.

-To ALL'WHoM IT MY ooNoERN: e

'Be it known, that I, GEORGE CRoMPTcN, of Worcester, Staten of Massachusetts, have invented aoertain` new and. useful improvement in Power Looms, and do hereby declare thatthe fol'lowifngjs,4 a. full, clear, and exact description thereof, reference being had to the accompanying drawings making part of the specifications, in whichj e Figure 1 is an end elevationofia| loom with my improvements applied.

f Figure 2 is a back` elevation, and figures 3 and 4, enlarged detached views of the improvements. The same letters indicate like parts in all the gures. 1 My improvements relate-rst, tothe motion `which operates the lifter and depressa', and secondly, to the angle' of the shed in harness motion of fancy looms.

-'1hel movement generally given to lifter's and I depressers in the harness motion in fancy looms is derived froml a crank'. While ythis answers tolerably well in narrow or common looms, it has heen Afound. objeotionable'in broad looms, for the reason that 'sufficient dwell or pause ,could not he obtained 'for the passageof the shuttle.v To remedy this, earns` have been applied, of such shapes as to give the required panse of motion to the shed of the warp, and `thereby allow a free and.

i unimpeded passage for the shuttle.

By wear and tear these cams soon lose their original shapes, an d finally become useless, unless frequently repaired or-replaoed. To overcome this objection, andl 'also obtain' a movement which can he readily adjusted ,for more or less dwell or pause to the shed, is the object of my invention.

In fancy weaving it is highly desirable to obtain such an arrangement. Coarse, heavy yarns cling in shedding, and n eeoli opening earlier for the passage ofthe shuttle than finer yarns. yMore or less harness also, demand an adjustability.

2 U.`S. `PATENT OFFICE, 1861.-No.`2,'516.'

'Cromptons Improvement 'in Looms.

To this end have inventedian arrangement tosuit all kinds of' yarn and figures', and which I will describe as follows; l y i In the accompanying drawings lthe harness motion represented is thewell known Crompton harness motion, so called. a represents the lathe; b b, the loom sides; c c, the crank arms; and m, the 'crank shaft; Zand n, the slide rods;- O, the elevator; and p, the depresser. On' the end of the crank shaft is a face plate oZ, having'a stud or crank e, which, moving in the direction of the arrow, communicates motion to a rocking plate h through the connector g, the crank pin c being represented nearly at the top'. One-half a revolution of the crank shaft rocks the plate t one-quarter-o a revolution. The connector 7c attached to stud t is on the rockingf'ilate, and stud j, on the bracket'u on the slide rod Z, conveys motion to said slide rod, and.- through links q and 1 and lever s, to which'v they l.are attached; also to slide rod n.

The'sheddis now evened; and at the-point where the chain cylinder operates to distribute the jacks for another shed,- the crank pin e, by the motion of the crank l shaft, ascends, returning the slide rods and the lifter and depresser then on to l their original respective positions.` The connection g, being short in its proportion to the crank which gives it motion, makes'a reduced motion as it passes over the top centre, While the connector 7c gives also a reduced motion, on account of its oscillation 'towards the centre .or stud ton which the plate-h rocks. Thus, as

both connectors g and 7c are simultaneously'moving with reducedsp'eed, the pause or dwell is given to thel shed of the warp, which is operated by the lifter and depresser.

i This mode of operation, just described,is like that represented at g. 4, (being an enlarged detached view.) The crank plate oZ is divided into 20 divisions, as .shown by red lines and figures. At whatever vpoint during its revolution the crank e may be, the studs f and twill be in positions as per corresponding figures. In their passage the outside row of gures shows the relative positions of the stud f in ascending, and the inner row when descending; that of the stud is reversed, the outside representing its descent, and the inner series of figures its ascent, and as also illustrated by the direction ofi-the' arrows. In figure 4, as the crank e moves in`the direction of the. arrow from the point represented to the red figure 7, (thus making seven-twentieths of a revolution of `the crank shaft,) the' stud i starts from and returns to the position represented, while the slide rod represented by the vertical red line g makes comparatively 'no lmoven1ent,`as shown by the red figures l, 2, 3, 4, 5, 6, 4"7, under the horizontal red line b.

This is the extreme amount of dwell or pause which can be obtained. When less is required, lthestuds i and j are raised in their slots; they are` raised to the extreme ends of theirr respective slot-s, as in igure`3.` The amount lof dwell is thus much diminished, the crank being in the same-relative position,and, making f, seven-twentieths of a revolution, carries the slide rod considerably farther than in figure 4, as will be seen by the iigures under the horizontal red line.

U. S. PATENT OFFICE, 1861.-IN0. `2,516. l' `3 Cromptons Improvement in Looms.

It will be thus seen that, by adjusting .the connector by its' studs fandj in4 di'erent parts of the slot, Amore or less dwell or pause may be communicated to the slide rods,'and through the jacks, which operate the harness, to the shed'ofthe warp, and thereby obtain a more clear and uninterrupted. passage `for the iiight of the shuttle, and also aording a more d'u'rable device than such'cams as have been used for the.purpose,.bcsi'des the advantages of an adjustable arrangement. 'Y It is obvious'thatthis movement may be applied to different kindsof litters and depressersused in fancy looms, with slightmodifications, to suit the circumstances of thecase. But so long as the driving cranlr'operates the rocking plate,

and that in turn operates; the lifter and depresser in the peculiar manner and forthe purposesho'wn, the principle of' my invention is retained.

Thesecond part of' my invention is for obtaining a variable incline to the lifter and' depresser. In the old Crompton loom, patented Nov. 25, A. D. 1837, the incline is absolute,l for the purpose of'bringing all the threads ofthe warp in iine with each other, when the shed is open.` A patent was issued to me Nov.

14, 1854, for. an adjustable lining to the lifter and depresser, which could beset at any angle desired. In both cases, however, the back harness was raised earlier than the front harness.` `It -isdesirable'` that they all 'commence their movement at'the same moment. To elect this, I pivotthe lining on the lifter and depres'ser, as at w and o, iig. l. p When .the shed is evened, these linings are in the same horizontal line as the hooksof the jacks, which are caught'by them; and just bef'ore the shed is fully formed, the ends of the linings' near the front of the loom strike projections a: da y, elevating and depressingthem to any angle desired, as seen in figure l, as these projections a: & y may be adjusted. There is a flat spring to eachlining z z resting upon a pin af, as shown, which, when it leaves the projection, returns it to a horizontal. position upon said pin a; it is then ina .position for a new distribution ol' the jacks for the succeeding shed,and they operate again as above described.

By this arrangement, I produce any desirableincline or angle to the lifter and depresse@ and, therefore, to the shed, as described,I and commence moving the jacks "and all the warp threads, as described.

Having,r thus described my improvement, what I claim as new, and desire to The operation of the crank on the'roclrer plate, and the combination therewith of the connection to the lifter anddepresser, as and for the purpose set forth.

Also the'arranbemeut of the lifter and depresser-for-producingan incline to the shed, as above describedi y i l eno. oRoMPf-roiv.

Witnesses: A

ANDREW WILLL", W. A. WILLIAMS.- 

